This study aimed to determine how the level of video game addiction has an effect on thoracic kyphosis curvature in secondary school students. The sample group of the study consisted of 5th, 6th, 7th and 8th grade students studying in Çınarcık Firuzan Kınal Primary-Secondary School by deliberate sampling method. The data were collected from 87 students (47 girls, 40 boys) who participated in both the initial and subsequent measurements. The students were selected on the basis of volunteerism and completed the questionnaire questions entirety. The data was collected by using the Personal Information Form, the Video Game Addiction Scale for Children and the flexicurve. The SPSS 21 package programme and the kyphosis index (KI = (TW/TL) x 100) were used to evaluate the data. According to the obtained results, it was determined that video game addiction did not have a statistically significant effect on the kyphosis index in children, the addiction scores of children who participated in recreational activities (p=0.01